Limbing A Tree; Bucking A Log - Senix CSE12-M Operator's Manual

FELLING BACK A CUT
Make the felling back cut at least 50 mm
higher than the horizontal notching cut (Figure
9). Keep the felling back cut parallel to the
horizontal notching cut. Make the felling back
cut so enough wood is left to act as a hinge.
The hinge wood keeps the tree from twisting
and falling in the wrong direction. DO NOT
cut through the hinge.
As the felling gets close to the hinge, the tree
should begin to fall. If there is any chance
that the tree may not fall in desired direction
or it may rock back and bind the saw chain,
stop cutting before the felling back cut is
complete and use wedges of wood, plastic or
aluminium to open the cut and drop the tree
along the desired line of fall.
When the tree begins to fall remove the chain
saw from the cut, stop the motor, put the
chain saw down, then use the retreat path
planned. Be alert for overhead limbs falling
and watch your footing.

LIMBING A TREE

Limbing is removing the branches from a
fallen tree. When limbing leave larger lower
limbs to support the log off the ground.
Remove the small limbs in one cut (Figure 10).
Branches under tension should be cut from
the bottom up to avoid binding the chain saw.
Tree limbing
Keep work off ground. Leave support limbs until log is cut.

BUCKING A LOG

Bucking is cutting a log into lengths. It is
important to make sure your footing is firm
and your weight is evenly distributed on both
feet. When possible, the log should be raised
and supported by the use of limbs, logs or
chocks. Follow the simple directions for easy
cutting. When the log is supported along its
entire length, it is cut from the top (overbuck)
(Figure 11).
Log supported along the entire length
Cut from top (overbuck). Avoid cutting earth.
16
Fig. 10
Fig. 11
When the log is supported on one end,cut 1/3
the diameter from the underside (underbuck)
(Figure 12). Then make the finished cut by
overbucking to meet the first cut.
Log supported one end
When the log is supported on both ends,
cut 1/3 the diameter from the top (overbuck)
(Figure 13). Then make the finished cut
by underbucking the lower 2/3 to meet the
first cut.
Log supported both ends
When bucking on a slope always stand on the
uphill side of the log (Figure 14).
Bucking a log
Stand on uphill side when cutting because log may roll
To maintain complete control when cutting
through a log, release the cutting pressure
near the end of the cut without relaxing your
grip on the chain saw handles. Don't let the
chain contact the ground. After completing the
cut, wait for the saw chain to stop before you
move the chain saw. Always stop the motor
before moving from tree to tree.
2nd cut overbuck (2/3 diameter)
to meet 1st cut (to avoid pinching)
1st cut underbuck
(1/3 diameter)
to avoid splintering
Fig. 12
1st cut overbuck (1/3 diameter)
to avoid splintering
2nd cut underbuck (2/3 diameter)
to meet 1st cut (to avoid pinching)
Fig. 13
Fig. 14
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